The study has been conducted to determine the effect of the androgen hormone, 17α-Methyltesterone (MT) on survival rate, growth rate and the sex ratio of tiger shrimp, Penaeus monodon (Fabricius,1978) Postlarvae (PL). Five different doses of MT 200, 400, 600, 800, 1000 mg/kg feed were incorporated in the commercial diet of P. monodon PL for 50 days from PL3 till PL53 and a control without MT. The highest survival rate 68.0% ± 4.6 of shrimp PL was archived in control treatment compared to the MT treatment doses. The highest dose of MT1000 mg/kg feed produced the highest body weight (BW) of 0.26g ± 0.1 and TL of 31.99 ± 3.8. Highest concentration of MT 1000 mg/kg feed did produce highest 76.6% male population among survivors was significantly different among the treatments. The study concluded that MT beside with the production of male population of P. monodon PL could also act as a growth promoter with the increased hormone dose but it adversely decreased survival rate.
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